Water-tube boiler.



H. J. GEBYHABDT.

v WATER TUBE BOILER. v

APPLICATION FILED Aue. nl. 1916. ninswsn APR. 13.1918.

1 ,285,677 Patented Nov.. 26, 191s.

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Mlf 1M f @im .smilfls PATENT operon. i

Y .HENRY ai. .enen-AEDT, or -cnrcneo, ILLINOIS.

WATER-TUBE .Bonnin Patented Nov. a6, 191e.

applicati@ inea Augustin 191e, serial Ne. 114,344. Renewed april 13, 191s. serial I110.228,501.

` To all 'whoma'trmay concern:

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-Be it'lmownthat I, HENRY J. GEBHARDT, acitizen .of the United States vof America, and "resident of Chicago, Cook V4county, Illinois, have'invented a Certain new and useful Improvement in VVater-Tubey Boilers, vof 'which the following is a specification.

`My invention'relates to boilers of that kind in` which ythe water is circulatedy through tubes which are yconnected together at their `ends 1by headers. In boilers of this kind, it 'has heretofore b'eenlthe practice to admit `the 'water lat the top of each header,fa-nd to allow the water to escape through tubes connected toene side wall of the header. 1 In such case, ityhas "also been the practice `to` connect a 'mud-drurnto the bottom of eachheader. Generally stated, the object of 'my invention'l is -to `provide an improved construct-ion andarrangernent which will obviate the use 'of said mud-drum, and which will materially reduce the cost of manufacture, without inv l'anylway lessening-the eftciency of theboilen "'*vMore specifically stated, the object of my V,invention 1s to provide a combined header and separator 'which' will lie-.entirely `sufcient and which will take the place of the header and separate mud-drum heretofore -eniployed'in boilers 1of this kind.

A further and special object 'of my invention is to provide an f' improved construction and "arrangement, whereby a water-tubeheader may `:beprovided with means for blowing the soot and dust oit from the tubes. 'Itfisalso an object of iny invention to provide 4certain details and features off construction 'and combinations tending 'to infcrease the general etlciencyand desirability of" a,waterLt'ube-header of this particular character.

`@To'jthe foregoing vand otherfuseful ends, `inyinvention consists in matters hereinafter set'forth fand claimed. f 'In the at',Companyinr` drawings ""'iFig ure' 1E is a rlongitudinal..section of an "ordinarywater-tube boilerprovided with a rear header embodying the principles l of my "inventionf 5 Fig. Qfis an Ienlarged Avertical Qsection of said header', the section being taken in a plane parallel with thewaterft'ubes'.

-Fig3 is a sectionfon line 3 3 of Eig. Q4, `s'howingone'of the vheaders in' cross-section. ,"Fig.` tis a verticalsection on line 4-4 in Fig.j3. f' l 1 IAsthus"illustrated, the furnace: comprises 4a combustion.- chamber A having a `grate a anda bridge-wall Bof .any suitable character. The :Water tubes C are inclined downwardlyat their rear.ends, the front header c .being supported on `the front wall of the furnace, and the rstbaii'le-plate l being sin ported .on the upper edge of the .bridgewall. The'transverse drum D yis supported -in any suitable manner,- and is 'connected by la-,pipe d with .the front header-.c in the `usual and .welleknown manner. "The sec'ondbafile-plate E serves in conjunction 'with the wall e to cause a .downward movement of the products of combustion vthrough the second pass of the boiler, and then upward through the 4third pass to Athe opening 2 which leads to the'fstaok of the furnace. At their lower and rearl ends, the water tubes C are connected'ltogether by `means of 'aA header F which restsfon an I-lie'amfI-f in the masonry ofthe furnace. vThe 4tube 3` 'leads downward 'from the drum D to the'uppermost portion ofthe inner wall of the header F, at a point just above the uppermost tube C, so vthat this tube 3 is alsosu'bjecte'd to the heat of the products of combustion moving upward through the thi-rd pass of the boiler.

The headerr F is of a novel form and is constructed as 'followsrThe inner wall t of said header vis inclined lto extend vat right anglesto the tubes,vbut the outer wall 5`is substantially vertical. In this way, the base of the header 'is enlarged to form a mudchamber 'G in which the mud and other impurities in the water may settle and come to rest. The water enters the top of the header from the pipeB at a temperature which is much'less than the temperature of the water which is leaving the header through the tubes C, as the latter are nearest to the fire, and for the further reason that the wall 4 is directly exposed to the heat. As the wall 5 is away from the heat, the water entering the topof the header will descend near the wall V5, Vwhich is cooler than the rinclined inner Vwall of the header, and the water, after becoming heated. will frise and be de- 'ected into the tubesv C bvY the battle-plates H, itbeing'fobserved that these Ybaiile-plates are inclined so that their lower edges are iust in `line with the tops of said tubes. In this way,

"the said battle-plates or deflectrs do not inwill be understoodA that these hand-holes are provided in the usual manner with removable covers of any suitable character. The mud-chamber G, it will be seen, is immediately below the lowermost deflector or baffie-plate L, which latter eXtends a little farther toward the wall 5 of the header than the others. The plates H and 7L in effect form compartments between them leading to the inlet openings of the tubes. A blow-off pipe J is suitably connected with an opening in the lower portion of the wall 5, so that the accumulation in the chamber G may be discharged therefrom. The lower portion of the inner wall 4 is covered by the masonry 6, so that the mud-chamber G is protected from the heat, thus making the said wall above this chamber the hottest portion of the header, which is essential to the proper cir culation of the water from the tube 3 into the header and then out through the tubes C, in a manner that will be readily understood. ln this way, it will be seen that the header F. which can be constructed in any suitable manner, either by casting it or forming it from sheet-metal, serves also as a means for precipitating the impurities in the water, the base of the header itself forming a mud.A chamber. Consequently, no separate muddrum is necessary, and thus the cost of manufacture is materially reduced.

lt will be understood that the header F can. be of any suitable or desired width. For example, it can be just wide enough to accommodate one row of tubes extending up and down thereof, and in such case a number of these headers will be arranged side by side in the usual and well-known manner. vWith this construction. one side of each header may be provided, in any suitable or desired manner. with passages K provided with nozzles 7c arranged in position to blow steam between the tubes S and C, (see Figs. '2. 3 and Ll in which the passages are shown formed in the. side of one of the headers. the other headers being similar. In Fig. 4. the tubes 3 and C are, of course, on the next header-section which is similar to the one shown in Fig. the two sections, and the other sections, being arranged side by side). thereby to remove the soot and dust from the tubes. For this purpose, these passages K are connected with a boss L on the outer wall of the header, at the upper end of said wall, and a supply-pipe Z is connected with said boss. This pipe Z can be connected in any suitable manner with the source of steam pressure, whereby steam may be blown through all of the passages at the same time. When drv steam is blown through these passages K in the sides of the headers, and allowed to escape through the nozzles 7c, the soot and dust will be removed from the tubes. With this construction. the steam-connections to the header-sections are permanent, and the passages K are never open at their Laatse?? outer ends to the atmosphere, but are always closed in this respect.

With further respect to the combined header and separator F, it will be understood that the 'water entering from the pipe 3 is at a temperature of substantially three hundred degrees Fahrenheit, or over, so that the lime and other minerals which have been previously held in solution are reduced to small particles which are held in suspension in the water, and which are precipitated between the wall 5 and the lower edges of the bathe-plates or deflectors H and 7L, and into the Chamber G at the bottom of the header. In other words, these particles of matter have a tendency to seek the cool .side of the header, and every time the water nieves downward and passes up under one of the battle-plates H the particles of matter are precipitated to the bottom of the header, in stead of following the outward flow of the water through the tubes. Preferably, the bathe-plates H have their edges di Eerent distances away from the wall 5, the upper plate being the farthest away and the lower plate being the nearest to said wall, so that the downward passage formed at the rear of the header is somewhat contracted at its lower end. the upper end of this passage having substantially the same or even a greater capacity than the tube 3, so that the circulation through the header will be of the desired character as desired. The plates H and L cause the incoming and descending water to hug the outer wall 5 of the header, Y

'With the construction shown and described, therefore, the blower for Cleaning the soot and dust from the water tubes is incorporated in the structure of the header, each sect-ion of the header having only a single steam connection for the several passages and nozzles thereof, whereby an eX- ternal steam-pipe connection for each nozzle is not necessary.

What l. claim as my invention is l. Awater-tube-boiler comprising a header having inlet and outlet openings in the inner sidey thereof. tubes for said openings to circulate the water through saidheader'and means forming compartments in the header to divert the outgoing water to said outlet openings, the base of the header itself forming a settling Chamber,` and ay blowof for the outer side of said chamber at the bottom thereof.

2. A water-tube-boiler comprising a header having inlet and outlet openings in the inner side thereof, and tubes for said openings.

to circulate the water through said header, the base of said header forming a chamber, the inner wall of' said header above said chamber being exposed to the heat, means to cover the lower portion of said wall, the outer wall of said header beingk vertical,

hand-hole closures for said outer wall, each closure being in line with one of said tubes, a blow-orf for said chamber, and inclined baffle-plates in said header to keep the descending water near the outer wall and deiect the rising water into the outlet tubes, said inner wall being inclined toward the outer wall, and said chamber being under the lowest balie-plate.

3. A wateretube-boiler comprising a header having inlet and outlet openings in the inner side thereof, and tubes for said openings to circulate the water through said header, the base of said header forming a chamber, and inclined baie-plates in said header to keep the descending water near the outer wall and deflect the rising water into the outlet tubes, said chamber being immediately below the lowest battle-plate.

4. A water-tube-boiler comprising a header having inlet and outlet openings in the inner side thereof, tubes for said openings to circulate the water through said header, the base of the header itself forming a chamber, the lower portion of said header being enlarged to form said chamber, and means to cover the lower portion of said inner side to keep the contents of said chamber relatively cool, said inner side above said chamber being exposed to the heat and inclined toward the outer side, said outer wall being substantially vertical and away from the heat, and a baille plate leading downward from said inner side over said chamber and stopping short of the outer side. to form the entrance to said chamber.

5. A water-tube-boiler comprising a header having inlet and outlet openings in the inner side thereof, tubes for said openings to circulate the water through said header, the base of the header itself forming a chamber, means in said header to keep the descending` water near the outer wall of said header and cause the rising water to enter the outlet tubes, said inner side being exposed to the heat, said outer wall being disposed away from the heat to remain relatively cool, means to deflect the water into said tubes, and means to protect said chamber from the heat.

6. A water-tube-boiler comprising a header having inlet and outletopenings in the inner side thereof, tubes for said openings to circulate the water through said header and means forming compartments in the header to divert the outgoing water to said outlet openings, the base of the header itself forming a settling chamber, said tubes being iuclined to extend downwardly to said openings, said inner side being substantially at right angles to said tubes, and the outer wall of said header being vertical and hav` ing hand-holes in line with said tubes. y

In a water-tubeboiler, a combined header and separator for Connecting together the ends of tubes, and for separating the impurities from the water and precipitating the same to the bottom of the header, and a blow-ofi'z for the outer side of said header at the bottom thereof, said header having interior deiiecting means to cause the incoming and descending water to hug the outer Wall of said header.

8. In a water-tube-boiler, a header for connecting together the ends of the tubes, and means associated with said header to blow steam between the tubes to remove soot and dust therefrom, said header being made in sections, and said means including passages formed in the sides of the sections, and means whereby steam may7 be blown through all of said passages at the same time, including only a single permanent steam connection to each section.

9. In a water-tube-boiler, a header for connecting together the ends of the tubes, said header being formed on its inner side with jet-openings to blow steam between the tubes toA remove the soot and dust therefrom, said header being formed with passages leading to said openings, said header being formed with a permanent steam-inlet which is com mon to said passages. so that said passages are always closed to the atmosphere at their outer ends, and means for supplying steam to said steam-inlet, whereby the steam passes vthrough the header in direct contact therewith.

Signed by me at Chicago, Illinois, this 4th day of August, 1916.

HENRY J. GEBHARDT.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, 1). C. 

